Boiler



Jan. 1, 1929.

D. J. MAJUGA BOILER Filed NOV. 19, 1927 5 'SheeLS-Shee A /v//L f MAJUGAINVENTOR ATTORNEY Jan. l, 1929.

D. J. MAJUGA BOILER l5 Sheets-Sheet 2 Filed Nov. 19, 1927 INVENTOR 75L/1mito uf ATTORNEY Jan. l, 1929. 1,697,015

. D. J. MAJUGA BOILEB med Nov. 19, 192'/ :s sheets-sheet 5 O O l 36 O OO O O O f A o o o /3e ll b L l f if h /0 ,5 A/v//L fMAn/GA 0,/ l2 9lNvENToR B ,R du www b5 ATTORNEYv DANIIL J. MAJUGA,

PATE-lf FECE.

F MOSCOW, RUSSIA.

BOILER.

Application filed November My invention relates to boilers and has aparticular reference to boilers used for heating buildings.

lhe object of my invention is to provide a. boilerI ot a simple andcompact construction with a large heating surface and withk a veryel'iicient utilization of the heat ot the burned gases.

For this purpose I use a cylindrical boiler o with a Firebox inside andwith a concentric semicircular shell between the cylinder and thefirebox, this shell containing several return passages for the liucgases.

My invention is more fully described in the accompanying .specificationand drawing` in which- Fig. 1 is a sectional elevation of my boiler,Fig. V2 is a cross section on the line 2--2 of Fig. 1, Fig. 3 is a planview in section, Fig.

o 4 is a section on the line 4 4 of Fig. 1, Fig.

5 is a front view, Fig. 6 is a rear view and.

Fig. 7 is a diagrammatic view of the passages for the exhaust gases, theboiler being shown developed on a. horizontal. plane.

My boiler consists of a cylindrical shell 1 with a cylindrical ireboX 2inside. rlhis lircbox (or fire tube) has an enlargement 3 in the frontpart oi the boiler to provide an ash chamber .for the grates 4. Back ofthe :so grates a. wall 5 is placed to protect the steel shell 2.

In the space between the outer shellL 1 and the iire tube 2 asemicircular shell 6 is placed supported by the end plates 7 and 8 ofthe boiler. This shell communicates with the fire tube 2 in the rear bmeans of a tubular aperture or a short tu e 9 and is divided intoseveral compartments by means of longitudinal walls .10 and 11. rl'heWalls 10 enclose a compartment or Hue 12. They are provided withapertures 13 in the front of the boiler (Fig. 7 which form acommunication with compartments or 'Hues 14. The walls 11 have apertures15 in the rear forming a communication with compartments or fines 16.The latter are provided with apertures 17 in the front formed by shorttubes 18 and extending outside of the shell 1. The tubes 18 form acommunication between the y Ilues 16 and outside flues 19 formed in thebriclrwork 20. These fines 19 are separated by a wall 21 and extend tothe rear of the boiler partly encircling the boiler 1 on the outside. Atthe rear they are cpnnected to;

19, 1.927. Serial No. 934,375.

the foundationfbriclrworlr 2O to the smoke stack (not shown).`

The semicircular shell 6 forms two concentric water chambers 23 and 24.They are connected together lat .the front `by a tube 25. A tube 26extends above the boiler vand connects it with the main heating pipes 27(shown with dotted lines). The return or cold water is fed into theboiler through a tlanged nipple 28 connected with the return pipe 29(shown with dotted lines).

The boiler' is covered on the outside with a layer of heat insulatingmaterial 30. The openings in the rear arecovered with covers 31 and 32provided with a heat insulating material 33 and 34, such as fire brick,tile or similar refractory material. An aperture with a cover 35 isprovided for cleaning the boiler.

Openings in the front are closed with covers 3G and 37 attached withbolts 38. The cover 37 is provided with additional apertures closed withhinged doors 39, 40 and 41. The first two doors are used forinspectingthe tire, adding fuel and breaking the clinkers, and the door41 is used for removing ashes.

Important advantages of my boiler are that it has a large heatingsurface therefore allowing a very rapid circulation of water, so that amuch smaller boiler can be used for the same amount of heating requiredthan would be the case with an ordinary type of a boiler; also that avery complete utili- Zation of the exhaust gases is obtained due to verylong iiues inside of the boiler.

I claim as my invention:

1. In a boiler, the combination with an i outer cylindrical shell, of aninner cylindrical shell concentric with said outer shell, end plates atthe ends of said outer shell supporting the ends of said inner shell,means to burn -fuel in the front end of said inner shell, anintermediate shell between said outer and said inner shell, the walls ofsaid intermediate shell being concentric with the walls of said othershells and being supported by said end plates, said inner shell beingsemicircular in crossection and occu pying the upper portion of thespace between said other shells, a tubular connection between the rearends of said inner and intermediate shells, a plurality of longitudi-`nal partitions in said intermediate shell proat the front and at therear of said shell, tubular connections between the lower portions ofsaid intermediate shell, and a brickwork outside of said outer shellwith ines connected with said last named tubular cons nections, saidfines with all ot said tubular connections, spaces in said intermediateshell between said partitions and apertures in said partitions formingcontinuons passages for exhaust gases from the inside ot' said innershell.

2. In a boiler, the combination vwith an outer cylindrical shell, ot aninner cylin` drical shell concentric with said outer shell, anenlargement in the trent end oi said inner shell, means to burn luel insaid enlargement, a refractory briclwork hetweei'i said enlargement andthe rear portion ot said inner shell, a seniieircnlar intermediate shellin the upper portion of the space between said outer and said innershells, the walls of said intermediate shell being concentric with thewalls of said outer and said inner shells, end plates attached to theends of said outer shell and supporting the ends ot said inner and saidintermediate shells, a tubular connection between said inner and saidintermediate shells, a plurality of longitudinal 'partitions in said.interniediate shell provided with apertures arranged alternately at thefront and at the rear, tubular connections between the lower portions ofsaid intermediate shell and said outer shell, all oit said tubularconnections, passages between said partitioi'ls and said apex tures inthe partitions lforming continuous fines tor exhaust from inside oi saidinner shell.

ln testimony whereoi:l I aiiix my signature.

DANHL J. MAJUGA.

